THE BANNOCK OVERTHRUST 693 
tributed the following faunal lists of collections from the Wells 
formation together with the following comments: 
At the very base of the Wells formation a Schizophoria is often very abun- 
dant, apparently the same species as White identified in New Mexico as S. 
resupinoides ? (Lot to1c). A short distance above a more varied fauna is 
usually found in which a large variety of Spirifer rockymontanus, the same which 
I identified in Colorado as S. boonensis, is specially abundant (Stations 28 and 
32). Large branching Stenoporas related to S. carbonaria are also a feature of 
this fauna. Another phase of the lower Wells fauna is shown in Lot 33. In 
this assemblage of species Marginifera splendens is extremely common and 
large branching Stenoporas are also plentiful. 
Lot 33 
T. 9 S., R. 45 E., sec. 22, SW corner. From beds about 500 feet above 
base of Wells formation. 
Stenopora Wellsiana Productus Cora 
Stenopora gracilis Productus Nebraskensis 
“Stenopora Idahoensis Productus semireticulatus 
Stenopora ? sp. Marginifera splendens 
Derbya sp. Spirifera rockymontanus 
Lot 45 
See section. 
Zaphrentis Gibsoni Productus semireticulatus 
Monilipora Prosseri Spirifer cameratus 
Rhombopora lepidodendroides Composita subtilita 
Productus Cora Euconospira n. sp. 
Lot 28 
AE OV Se Sle SeC..35) SE. 
Spirifer rockymontanus 
Myalina aff. Kansasensis 
Aviculopecten sp. 
Lot 32 
Same locality as Lot 28 but from beds about 150 feet lower in the section. 
Stenopora Idahoensis Productus Cora 
Stenopora ? sp Spirifer rockymontanus 
Batostomella ? sp. Composita subtilita 
Derbya sp. Myalina sp. 
Lot rotc 
See section. 
; Schizophoria resupinoides ? 
